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Table of Contents
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To help you detect and address changing demand for resources, the platform's control features include monitoring alerts with notifications, action plans for automation, and autoscaling.

Basic control and scaling concepts

ConceptDescription
MetricA built-in metric that is provided by a hypervisor or provider (e.g. CPU usage) or a custom metric that the user creates and populates using API calls
AlarmAn alarm activates when a metric passes a certain threshold. If you imagine a dashboard for your metrics, alarms are like red lights that light up when conditions change, for example, when there is a problem. See Manage cloud alarms and Infrastructure Alarms
AlertAn alert enables you to configure notifications or actions from alarms. Alerts are like a worker monitoring a group of alarms; when all the lights for the group are lit up, the alert is activated. Alerts can trigger action plans. See Control View
Action plansA sequence of actions to perform on entities on the platform, such as VMs or scaling groups. An action plan is run by a trigger.
TriggerA trigger is an alert or a schedule that will run the action plan, for example, during times of increased demand. 
Scaling groupFor horizontal autoscaling, create a scaling group for a VM with rules to define how the platform should scale it out. You can then include scaling operations in an action plan.
Vertical scalingVertical scaling means scaling up, adding more resources to an existing VM, for example, boosting your CPU and or RAM capacity.
Horizontal scalingHorizontal scaling means scaling out, deploying more VMs when you need more resources. 


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Excerpt

Create Alerts

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The platform's alerts feature enables you to track and act upon changes in your cloud environment. To configure Alerts do these steps:

  1. Go to Virtual datacenters
  2. Go to Virtual Appliances → Virtual machines. Create and configure your VMs. See Manage Virtual Machines
    1. Remember to enable metrics. See VM monitoring and metrics. 
  3. Go to Virtual appliance → Monitoring and check that the platform is retrieving metrics. You may have to wait a few minutes

  4. Go to Alarms. Create alarms for built-in metrics, scaling group metrics, and custom metrics as required

    1. To create alarms, go to an Alarms tab in either the Virtual datacenters view (see Manage cloud alarms) or the Infrastructure view (see Infrastructure Alarms).

    2. Select an entity, a metric, and a metric statistic and enter a threshold, then save the alarm
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  5. Create alerts to notify users. See Manage Alerts.
    • You can also use these alerts to trigger scaling, see Cloud bursting. 
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Cloud bursting

You can perform cloud bursting with the platform's Control features. Cloud bursting is automatically deploying new resources in any part of your hybrid cloud environment to meet a peak in demand for resources. Here is a brief outline of how to configure cloud bursting with VM automation.

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  1. To optionally use VPNs between VDCs (see Connect virtual networks with VPNaaS), use networks with different addresses, e.g. the default network and a custom network set as the default, see Manage Networks

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  1. Remember to enable metrics. See VM monitoring and metrics.

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Define scaling groups for VMs. The base VM can be deployed or undeployed. See Manage Scaling Groups

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Create alarms for built-in metrics, scaling group metrics, or custom metrics. See Custom Metrics Resources.  To work with auto-scaling, we recommend that you create alarms for both the high threshold, when you will require more resources, and the low threshold, when these resources can be retired

  1. To create alarms, go to the Alarms tab in either the Virtual datacenters view (see Manage cloud alarms) or the Infrastructure view (see Infrastructure Alarms).

  2. Select an entity, a metric, and a metric statistic and enter a threshold, then save the alarm

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Alarms

Before you begin:

  1. Retrieve VM built-in metrics, by editing VMs and enabling monitoring (see VM monitoring and metrics) or create custom metrics
  2. Optionally create metric alarms (see Manage cloud alarms and Infrastructure Alarms)

To create an alert:

  1. Go to Control → Alerts
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  2. Click the + add button
  3. Enter the alert details

  4. Select an existing alarm, or create a new alarm, and assign it to the alert. Repeat for the required alarms

  5. Click Save

If all alarms are activated, the alert will be activated. You can use the alert to trigger actions. See Manage Action Plans.

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Privilege: Access alerts section


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GUI Create an alert
GUI Create an alert



Remove alarms from alerts

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Privilege: Access alerts section, Manage alarms, Manage alerts

To remove an alarm from an alert:

  1. Click the delete button, and confirm
    The platform will remove it from this alert, but it will remain in all other alerts that it is associated with

To delete alarms, go to Cloud --> Alarms; see Manage cloud alarms


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Pages related to control of VMs

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